Furnace



(No Model.)

B. W. VANDUZEN.

FURNACE.

No. 3601182. Patented Mar. 29, 1887.

UNITED STATES PATENT Erica.

EZRA \V. VANDUZEN, OF NEWVPORT, KENTUCKY.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 360,182, dated March 29, 1887.

Application filed Scptemher7,1886. Serial No. 212,920. (No model.)

To all whom it may concern:

Be it known that I, EZRA W. VANDUZEN, a citizen of the United States, and a resident of Newport, in the county of Campbell and State of Kentucky, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

My invention relates to furnaces more especially adapted to steam-boilers. It may be applied to other purposes.

The first object of my invention is to provide a suitable lining for the doors and walls of a furnace, which accomplishes two purposesfirst,to prevent the parts from burning out and to resist the tendency of the heat to warp them out of shape; second, to allow a proper admission of air through orifices pierced in the doors and walls, delivering it to the furnace-chamber in a partially-heated condition, increasing the efficiency in the combustion of the fuel.

Another object of my invention is to provide suitable means for admitting a graduated or regulated amount of air into the rear of the fire-chamber through the ash-pit. In the ordinary furnace the combustion of the fire is more rapid and the heat the greatest at the rear, and in order to equalize the heat, causing the fuel to burn more rapidly in front and more slowly in the rear, I have provided means for regulating the admission of air to the rear part of the ash-pit, and also means for retardin g the admission of air through the grate-bars.

The several devices accomplishing these objects are illustrated in the accompanying drawings, making a part of this specification, in which Figure 1 is a longitudinal vertical section of my improvement. Fig. 2 is a top plan view on line :0 LE, Fig. 1. Fig. 3 is a central vertical section of the door and lining. Fig. 4 is an inside perspectiveview of the door and lining. Fig. 5 is an elevation of the outside of the furnace-door. Fig. 6 is a front elevation of the rear ash'pit doors, and Fig. '7 is a broken perspective of the rear grate-bars.

A represents the walls of the furnace;-B

the boiler; G, the aslrpit; D, the division-wall in the ash-pit; E, the fire-chamber; F, the front series of grate-bars, and G the rear series. The grate-bars G are supported at the rear end by the rear wall, H,which is provided with usual arches for fines. The front ends of grate-bars G rest on the division-wall D. The rear ends of these grate-bars are bent or inclined .upward, so as to keep an open space at the rear for the admission of air between and through the grate-bars.

F represents the front grate-bars, which are supported by the front wall and the partitionwall D.

or represents lugs on the grate-bars, to prevent their Warping laterally out of line.

i represents doors placed in orifices in the divisionwvall D, which divides the ash-pit in two chambers. These doors are hinged to said division-wall to swing into and out of the orifices therein and are provided with orifices 2, for the admission of air into the rear ashchamber, 3. These orifices may be covered with a damper, if desired; but I prefer to regulate the quantity of air admitted by par tially opening the doors.

As a further means of regulating the admission of air into the rear end of the combustion-chamber in a heated condition, the rear bars, G, are made to come together at the top surface and are pierced with orifices 4,to allow the escape of ashes and admission of air; but the rear grate-bars may be of the usual form and still accomplish several of the objects of my invention.

1 represents ribs, of which one or more may be used to prevent the bars or plates from warping. Two results are accomplished by these rear bars-first, the small amount of airopenings retardsarapid combustion atthe rear, and, second, maintains a nearly uniform heat and combustion of the fuel at the front and rear of the fire-chamber.

5 represents the lining of the furnace doors and walls. It is of shell form and rigidly at tached thereto by bolls 10, forming an open space, into which the air is received, if desired,through orifices 9,pierced in the doors or wall. It is shown at (l as attached to both the doors and front wall of the furnace. This lining may be made of cast metal or lire-clay. It is provided with slots 7 and 8, which serve the following purposes: The slots 8 allow of the lateral contraction and expansion of the face of the lining with little liability'of warping or breakingdue to the heating of the same. The slots 7 are for the same purpose with refandhaving orifices 2, substantiallyas described.

2. The combination, with a furnace having an ash-pit, of the division-wall D, separating the ash-pit into two chambers and provided with an orifice, two sets of grate-bars supported by the division-wall, the front set of grate-bars being open and the rear grate-bars abutting each other at their top surface and pierced with air-openings, and the perforated door 1, seated in the orifice and hinged to the division-wall to swing into and out of said orifice, substantially as described.

3. The combination,with the furnace having the rear wall, H, and ash-pit, and a division. wall, D, separating the ash-pit into two chanibers, of a perforated door, 1, in the divisionwall, the front grate-bars, F, and the rear gratebars, G, supported by the division-wall and rear furnace-wall and provided with a series of perforations, 4, substantially as described.

4. The combination of the furnace ash-pit divided by the partition-wall D and the front furnace-wall, A, and rear wall, H, with the rear grate-bars, G, abutting each other at their top surface and pierced with the air-openings 4, said grate-barssup-ported at their ends, respectively, by the rear furnace-wall and the division-wall, and the open front grate-bars, F, supported at their ends, respectively, by the front furnace-wall and the division-wall, substantially as described.

5. A shell-lining, 5, attached to the door or wall of a furnace provided with slots pierced in its face, arranged as shown, substantially as specified.

6. A shell-lining, 5, provided with slots 7 and 8, pierced through said shell, attached to the door or wall of a furnace provided with slots pierced in its face, substantially as specified.

7. In combination with a shell-lining, 5, attached to door-plate 1, the air-openings 9 and slots 8, pierced through the door and lining, as specified.

In testimony whereof I have hereunto set my hand.

EZRA WV. VANDUZEN. Witnesses:

ROBERT ZAHNE,

J. WATsoN Sins. 

